NSC LMC6494BEN, LMC6494BEMX, LMC6494BEM, LMC6494AEN, LMC6494AEMX Datasheet

October 1994

LMC6492 Dual/LMC6494 Quad

CMOS Rail-to-Rail Input and Output Operational

Amplifier

General Description

The LMC6492/LMC6494 amplifiers were specifically developed for single supply applications that operate from −40ÊC to +125ÊC. This feature is well-suited for automotive systems because of the wide temperature range. A unique design topology enables the LMC6492/LMC6494 common-mode voltage range to accommodate input signals beyond the rails. This eliminates non-linear output errors due to input signals exceeding a traditionally limited common-mode voltage range. The LMC6492/LMC6494 signal range has a high CMRR of 82 dB for excellent accuracy in non-inverting circuit configurations.

The LMC6492/LMC6494 rail-to-rail input is complemented by rail-to-rail output swing. This assures maximum dynamic signal range which is particularly important in 5V systems.

Ultra-low input current of 150 fA and 120 dB open loop gain provide high accuracy and direct interfacing with high impedance sources.

Features

(Typical unless otherwise noted)

nRail-to-Rail input common-mode voltage range, guaranteed over temperature

nRail-to-Rail output swing within 20 mV of supply rail, 100 kΩ load

nOperates from 5V to 15V supply

n Excellent CMRR and PSRR 82 dB

n Ultra low input current		150 fA
n High voltage gain (RL = 100 kΩ)			120 dB
n	Low supply current (@ VS = 5V)		500 µA/Amplifier
n	Low offset voltage drift	1.0 µV/ÊC

Applications

nAutomotive transducer amplifier

nPressure sensor

nOxygen sensor

nTemperature sensor

nSpeed sensor

Connection Diagrams

8-Pin DIP/SO

14-Pin DIP/SO

DS012049-1

Top View

DS012049-2

Top View

Amplifier Operational Output and Input Rail-to-Rail CMOS Quad Dual/LMC6494 LMC6492

© 1999 National Semiconductor Corporation

DS012049

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Ordering Information

	Package	Temperature Range	Transport	NSC
			Media	Drawing
		Extended −40ÊC to +125ÊC
	8-Pin Small Outline	LMC6492AEM	Rails	M08A
		LMC6492BEM
		LMC6492AEMX	Tape and Reel
		LMC6492BEMX
	8-Pin Molded DIP	LMC6492AEN	Rails	N08A
		LMC6492BEN
	14-Pin Small Outline	LMC6494AEM	Rails	M14A
		LMC6494BEM
		LMC6494AEMX	Tape and Reel
		LMC6494BEMX
	14-Pin Molded DIP	LMC6494AEN	Rails	N14A
		LMC6494BEN

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

ESD Tolerance (Note 2)	2000V
Differential Input Voltage	±Supply Voltage
Voltage at Input/Output Pin	(V+) + 0.3V, (V− ) − 0.3V
Supply Voltage (V+ − V − )	16V
Current at Input Pin	±5 mA
Current at Output Pin (Note 3)	±30 mA
Current at Power Supply Pin	40 mA
Lead Temp. (Soldering, 10 sec.)	260ÊC
Storage Temperature Range	−65ÊC to +150ÊC

Junction Temperature (Note 4)

150ÊC

Operating Conditions (Note 1)

Supply Voltage	2.5V £ V+ £ 15.5V
Junction Temperature Range
LMC6492AE, LMC6492BE	−40ÊC	£ TJ £ +125ÊC
LMC6494AE, LMC6494BE	−40ÊC	£ TJ £ +125ÊC
Thermal Resistance (qJA)
N Package, 8-Pin Molded DIP		108ÊC/W
M Package, 8-Pin Surface Mount		171ÊC/W
N Package, 14-Pin Molded DIP		78ÊC/W
M Package, 14-Pin Surface Mount		118ÊC/W

DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC, V+ = 5V, V− = 0V, VCM = VO = V+/2 and RL > 1 MW. Boldface limits apply at the temperature extremes

					LMC6492AE	LMC6492BE
Symbol	Parameter	Conditions		Typ	LMC6494AE	LMC6494BE	Units
				(Note 5)	Limit	Limit
					(Note 6)	(Note 6)
VOS	Input Offset Voltage			0.11	3.0	6.0	mV
					3.8	6.8	max
TCVOS	Input Offset Voltage			1.0			µV/ÊC
	Average Drift
IB	Input Bias Current	(Note 11)		0.15	200	200	pA max
IOS	Input Offset Current	(Note 11)		0.075	100	100	pA max
RIN	Input Resistance			>10			Tera W
CIN	Common-Mode			3			pF
	Input Capacitance
CMRR	Common-Mode	0V £ VCM £ 15V		82	65	63	dB
	Rejection Ratio	V+ = 15V			60	58	min
		0V £ VCM £ 5V		82	65	63
					60	58
+PSRR	Positive Power Supply	5V £ V+ £ 15V,		82	65	63	dB
	Rejection Ratio	VO = 2.5V			60	58	min
−PSRR	Negative Power Supply	0V £ V− £ −10V,		82	65	63	dB
	Rejection Ratio	VO = 2.5V			60	58	min
VCM	Input Common-Mode	V+ = 5V and 15V		V− −0.3	−0.25	−0.25	V
	Voltage Range	For CMRR ³ 50 dB			0	0	max
				V+ + 0.3	V+ + 0.25	V+ + 0.25	V
					V+	V+	min
AV	Large Signal Voltage Gain	RL = 2 kW:	Sourcing	300			V/mV
		(Note 7)	Sinking	40			min

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DC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC, V+ = 5V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes

				LMC6492AE	LMC6492BE
Symbol	Parameter	Conditions	Typ	LMC6494AE	LMC6494BE	Units
			(Note 5)	Limit	Limit
				(Note 6)	(Note 6)
VO	Output Swing	V+ = 5V	4.9	4.8	4.8	V
		RL = 2 kΩ to V+/2		4.7	4.7	min
			0.1	0.18	0.18	V
				0.24	0.24	max
		V+ = 5V	4.7	4.5	4.5	V
		RL = 600Ω to V+/2		4.24	4.24	min
			0.3	0.5	0.5	V
				0.65	0.65	max
		V+ = 15V	14.7	14.4	14.4	V
		RL = 2 kΩ to V+/2		14.0	14.0	min
			0.16	0.35	0.35	V
				0.5	0.5	max
		V+ = 15V	14.1	13.4	13.4	V
		RL = 600Ω to V+/2		13.0	13.0	min
			0.5	1.0	1.0	V
				1.5	1.5	max
ISC	Output Short Circuit Current	Sourcing, VO = 0V	25	16	16
				10	10
	V+ = 5V	Sinking, VO = 5V	22	11	11
				8	8	mA
ISC	Output Short Circuit Current	Sourcing, VO = 0V	30	28	28	min
				20	20
	V+ = 15V	Sinking, VO = 5V	30	30	30
		(Note 8)		22	22
IS	Supply Current	LMC6492	1.0	1.75	1.75	mA
		V+ = +5V, VO = V+/2		2.1	2.1	max
		LMC6492	1.3	1.95	1.95	mA
		V+ = +15V, VO = V+/2		2.3	2.3	max
		LMC6494	2.0	3.5	3.5	mA
		V+ = +5V, VO = V+/2		4.2	4.2	max
		LMC6494	2.6	3.9	3.9	mA
		V+ = +15V, VO = V+/2		4.6	4.6	max

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AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC, V+ = 5V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface limits apply at the temperature extremes

				LMC6492AE	LMC6492BE
Symbol	Parameter	Conditions	Typ	LMC6494AE	LMC6494BE	Units
			(Note 5)	Limit	Limit
				(Note 6)	(Note 6)
SR	Slew Rate	(Note 9)	1.3	0.7	0.7	Vµs min
				0.5	0.5
GBW	Gain-Bandwidth Product	V+ = 15V	1.5			MHz
φm	Phase Margin		50			Deg
Gm	Gain Margin		15			dB
	Amp-to-Amp Isolation	(Note 10)	150			dB
en	Input-Referred	F = 1 kHz	37
	Voltage Noise	VCM = 1V
in	Input-Referred	F = 1 kHz	0.06
	Current Noise
T.H.D.	Total Harmonic	F = 1 kHz, AV = −2	0.01
	Distortion	RL = 10 kΩ, VO = −4.1 V PP
		F = 10 kHz, AV = −2				%
		RL = 10 kΩ, VO = 8.5 VPP	0.01
		V+ = 10V

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5 kΩ in series with 100 pF.

Note 3: Applies to both single-supply and split-supply operation. Continuous short operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature at 150ÊC. Output currents in excess of ±30 mA over long term may adversely affect reliability.

Note 4: The maximum power dissipation is a function of TJ(max), θJA and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max) − T A)/θJA. All numbers apply for packages soldered directly into a PC board.

Note 5: Typical Values represent the most likely parametric norm.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: V+ = 15V, VCM = 7.5V and RL connected to 7.5V. For Sourcing tests, 7.5V ≤ VO ≤ 11.5V. For Sinking tests, 3.5V ≤ VO ≤ 7.5V.

Note 8: Do not short circuit output to V+, when V+ is greater than 13V or reliability will be adversely affected.

Note 9: V+ = 15V. Connected as voltage follower with 10V step input. Number specified is the slower of the positive and negative slew rates.

Note 10: Input referred, V+ = 15V and RL = 100 kΩ connected to 7.5V. Each amp excited in turn with 1 kHz to produce VO = 12 VPP.

Note 11: Guaranteed limits are dictated by tester limits and not device performance. Actual performance is reflected in the typical value.

Typical Performance Characteristics VS = +15V, Single Supply, TA = 25ÊC unless otherwise specified

Supply Current vs	Input Current vs	Sourcing Current vs
Supply Voltage	Temperature	Output Voltage

DS012049-25	DS012049-26	DS012049-27

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Typical Performance Characteristics VS = +15V, Single Supply, TA = 25ÊC unless otherwise specified (Continued)

Sourcing Current vs	Sourcing Current vs	Sinking Current vs
Output Voltage	Output Voltage	Output Voltage

DS012049-28 DS012049-29 DS012049-30

Sinking Current vs	Sinking Current vs	Output Voltage Swing vs
Output Voltage	Output Voltage	Supply Voltage

DS012049-31		DS012049-32
		DS012049-33
Input Voltage Noise	Input Voltage Noise	Input Voltage Noise
vs Frequency	vs Input Voltage	vs Input Voltage

DS012049-34

DS012049-35

DS012049-36

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